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Interaction of radio transmissions on mine monitoring and control systems.

Authors
Stolarczyk-LG
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. J0123038, 1986 May; :1-65
NIOSHTIC No.
10005557
Abstract
This report describes the creation of an efficient method to determine if command, control, communication, and monitoring (3cm) equipment in coal, metal, and nonmetal mines is susceptible to radio frequency interference (RFI) from the medium-frequency (MF) radio communications system. A qualitative and quantitative RFI test plan was developed for in-mine and laboratory evaluation of the equipment. The laboratory testing was accomplished using the transverse electromagnetic wave (TEM) test chamber. Detailed information on the test plan and the tem test chamber is included. During in-mine testing of the MF system, some underground equipment malfunctioned when the transmitter's radiating antenna was in close proximity. Electromagnetic compatibility (EMC) testing was done on three levels: component (circuit or box), subsystems, and system. Nine tables are included that show the results of testing various equipment for RFI.
Keywords
Mining-industry; Electromagnetic-energy; Electromagnetic-fields; Electromagnetic-interference; Electromagnetic-radiation; Statistical-analysis; Underground-mining; Coal-mining; Metal-mining; Nonmetal-mining; Radio-waves
Publication Date
19860501
Document Type
CP; Final Contract Report
Funding Type
Contract
Fiscal Year
1986
NTIS Accession No.
PB87-155032
NTIS Price
A05
Identifying No.
OFR-7-87; Contract-J0123038
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. J0123038
State
PA; NM
Performing Organization
A.R.F. Products, Inc.
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